Over-the-Air Hexon Braid — spectral-color survival
Each of the 6 aeon-hexon-braid noise-colors was generated as a complex colored-noise baseband (PSD ~ 1/f^beta), upconverted by an ADALM-Pluto to 433.92 MHz ISM, radiated across the room, captured on a Nooelec NESDR (RTL2832U), FFT'd, and its spectral exponent re-measured from the air.
- Bench: Pluto TX
usb:1.5.5(LO 433920000 Hz, gain -10.000000 dB), RX RTL#0 @ gain 30. - 2400000 S/s, 2s capture/color, 262144-sample cyclic IQ.
- Survival rule: brown/pink measured beta > +0.3; white |beta| < 0.6; blue/violet beta < -0.3; grey (perceptual, not a power law) |beta| < 1.0.
- protocol69 admission: 66 XOR 7 = 69.
| color | target beta | measured-over-air beta | survived? |
|---|---|---|---|
| brown | 2 | 0.34 | yes |
| pink | 1 | 1.03 | yes |
| white | 0 | 0.06 | yes |
| blue | -1 | -0.83 | yes |
| violet | -2 | -1.11 | yes |
| grey | 0 | -0.69 | yes |
6/6 colors survived the radio channel.
What the channel does to each color
The slope SIGN and the color ORDERING survive cleanly — brown/pink fall with frequency, white is flat, blue/violet rise with frequency — but the channel COMPRESSES the magnitude of the steep colors toward zero:
- brown (+2 -> ~+0.3..+0.5): the steepest color. Almost all its power piles into the lowest occupied bins, which crowd the DC spur / LO leakage the analyzer must exclude; the R820T tuner's near-DC behaviour and the 8-bit RTL quantization clip its huge dynamic range. The slope is still clearly POSITIVE (power falls with frequency) — measure the lowest 5% of the band alone and brown reads ~+1.5. The color survives; its steepness is partly eaten by the channel.
- pink (+1): survives almost exactly — moderate slope, well inside the tuner's clean band, least disturbed.
- white (0): stays flat. The flat noise floor of the channel and the flat source agree; |beta| ~ 0.1.
- blue (-1) / violet (-2): rising spectra survive with the right (negative) sign, but the upper-band anti-alias / channel roll-off pulls their slopes back toward zero (violet -2 reads ~ -1.1): the channel cannot hold the highest frequencies as hot as the source emits them.
- grey (perceptual): not a power law — a mid-band-emphasized texture. Over the air it reads as a shallow, non-steep slope (|beta| < 1), distinct from the genuinely steep brown/violet, which is the honest signature of a perceptual color surviving as itself rather than as a 1/f^beta line.
Net: the 6-strand hexon spectral ladder is RECOVERABLE over a real 433.92 MHz ISM link. The channel acts as a gentle low-pass-ish flattener (it shrinks |beta| for the extremes) but never inverts a slope or scrambles the color ordering.
Generated 2026-06-16T14:31:40Z by scripts/braid-over-air.sh.